Dr. Lewis is a sleep specialist, and a leading researcher and expert on the diagnosis and treatment of sleep disorders. He is Director of Sleep Care Services for Oklahoma Heart Institute, as well as Medical Director of Oklahoma Heart Institute Sleep Care of Hillcrest Medical Center. Dr. Lewis completed Fellowship training in Sleep Care, Pulmonary, and Critical Care at the University of Missouri Hospitals and Clinics in Columbia and the University of Kentucky Medical Center in Lexington. He completed his Internal Medicine Residency programs at the University of Nebraska Medical Center in Omaha and the Oklahoma University College of Medicine in Tulsa. Dr. Lewis earned his medical degree from the University of Texas Health Science Center in San Antonio.